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  • Every order is carefully packed and shipped by our team in Indiana. Your purchase helps support American jobs and hardworking families right here in the Midwest. Our AIRx Furnace / AC Filters and ClearChoice Fridge Filters are made in the USA.

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  • Spend $70 or more and your order ships free! We'll get your filters out the door fast so you can enjoy clean air and water.*

    * Orders under $70 ship for $5.99.

  • Shop with confidence! If you're not completely satisfied with your purchase, you have up to one year to return it for a refund or exchange. We stand behind every filter we sell.

    Learn More

  • Every order is carefully packed and shipped by our team in Indiana. Your purchase helps support American jobs and hardworking families right here in the Midwest. Our AIRx Furnace / AC Filters and ClearChoice Fridge Filters are made in the USA.

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We don't know what's in your water,
but we know there's nothing in your cart.

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20x24x1 AIRx DUST Air Filter, 4-Pack

5
142 reviews
◆
 
Average rating 4.7/5
5 stars
(116)
4 stars
(15)
3 stars
(5)
2 stars
(0)
1 star
(6)
AIRx 20x24x1-DUSTOur#: 194881
Made in USA
20x24x1 AIRx DUST Air Filter, 4-Pack
20x24x1 AIRx DUST Air Filter, 4-Pack
20x24x1 AIRx DUST Air Filter, 4-Pack
20x24x1 AIRx DUST Air Filter, 4-Pack
20x24x1 AIRx DUST Air Filter, 4-Pack
20x24x1 AIRx DUST Air Filter, 4-Pack
20x24x1 AIRx DUST Air Filter, 4-Pack
20x24x1 AIRx DUST Air Filter, 4-Pack
20x24x1 AIRx DUST Air Filter, 4-Pack
20x24x1 AIRx DUST Air Filter, 4-Pack
20x24x1 AIRx DUST Air Filter, 4-Pack
20x24x1 AIRx DUST Air Filter, 4-Pack
Compatibility guarantee — Wrong fit or not happy - we'll make it right, up to a whole year
Change every 3 months
Change every 3 months Swap on schedule for best performance
Made with pride in the USA
Made with pride in the USA Your purchase supports American jobs
MERV 8 - Standard
MERV 8 - Standard Healthy Families
Actual Dimensions
Actual Dimensions 19-1/2 × 23-7/16 × 3/4"
Compatibility guarantee
Compatibility guarantee Wrong fit or not happy - we'll make it right, up to a whole year

Filter Description

If you want to protect your HVAC system, keep your house a little cleaner, and remove a few nuisance particles from the air you breathe then yes, this is the filter for you! Not everyone needs to get rid of odors, and not everyone is overly sensitive to allergens and other, more harmful, particulates in their air. We make shopping for air conditioner filters and furnace filters easy!

  • Entry-level pleated air filter offers improved filtration over common fiberglass filters
  • MERV 8 rating means the filter attracts common large household allergens like dust, pollen, and mold spores
  • Replace every 90 days under normal use
  • Made with pride in the USA
  • 100% free returns on all filters

All product names, logos, brands, trademarks and registered trademarks are property of their respective owners. All company, product and service names used on this page are for identification purposes only. DiscountFilters.com and National Trade Supply, LLC are not affiliated with these brands.

$59.88

$74.85
Code DF20Save 20%
$14.97 per filter
Code DF20Save 20%
SAVE 47% 4-pack

1. Filtration level

Compare all →

2. Pack size

4 pack of 20 x 24 x 1 MERV 8 Dust

In Stock, Ships onWednesday, Nov. 11th
Just $70.00 more for free shipping! Get this — more unlocks free shipping! Buy this and your order ships free!

Orders over $70 ship free.

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MERV Filter Comparison

Choose the filtration level that fits your home — then tap Select to update your cart above.

MERV 8
Standard
DUST
RECOMMENDED
MERV 11
Superior
ALLERGY
OPTIMAL
MERV 13
Optimal
HEALTH
Best For
STANDARD
Residential / Commercial
Healthy Families
SUPERIOR
Residential / Commercial
Allergy Sufferers
OPTIMAL
Residential / Commercial
Premium Protection
Comparable
Ratings		 MPR 600 & FPR 5 MPR 1000–1200 & FPR 7 MPR 1500–1900 & FPR 10
Filtration Captures ≥90% of large particles Captures ≥95% of large particles Captures ≥98% of large particles
Dust, Lint & Debris
Mold, Pollen
Dander, Dust Mites
Smoke & Smog
Bacteria
Odor, VOCs
Your
Filter
MERV 8
Standard
DUST
Best For Residential / Commercial, Healthy Families
Comparable MPR 600 & FPR 5
Filtration Captures ≥90% of large particles
Dust, Lint & Debris
Mold, Pollen
Dander, Dust Mites
Smoke & Smog
Bacteria
Odor, VOCs
RECOMMENDED
MERV 11
Superior
ALLERGY
Best For Residential / Commercial, Allergy Sufferers
Comparable MPR 1000–1200 & FPR 7
Filtration Captures ≥95% of large particles
Dust, Lint & Debris
Mold, Pollen
Dander, Dust Mites
Smoke & Smog
Bacteria
Odor, VOCs
OPTIMAL
MERV 13
Optimal
HEALTH
Best For Residential / Commercial, Premium Protection
Comparable MPR 1500–1900 & FPR 10
Filtration Captures ≥98% of large particles
Dust, Lint & Debris
Mold, Pollen
Dander, Dust Mites
Smoke & Smog
Bacteria
Odor, VOCs

Swipe or use arrows · tap to select

MERV (Minimum Efficiency Reporting Value) is an ASHRAE industry standard for measuring air filter efficiency.

Compatibility guarantee

Wrong fit, leak, or just doesn’t work? We’ll send the right one. Free return shipping for all orders.

365-day satisfaction

Not happy? Send it back any time in the first year — we’ll make it right. Yes, even an open pack you’ve been running for months.

No-hassle returns

No restocking fees, no return-merch authorization mazes — just start a return and our helpful Customer Experience team will assist.

Filter Maintenance

Is it time to change your Filter?

Generally, we recommend you replace your air filters every 90 days. Find out below if you should change your filters more often.

If someone in your home has asthma or allergies change your filter every

6 Weeks

to ensure indoor air quality is at its best.

If you have pets change your filter every

2 Months

to avoid shedding and odor buildup.

If you have young children change your filter every

2–3 Months

as having clean air is even more important with children in your home.

Filter Specifications

What does this filter remove?

Filtration capabilities
Nominal Size
20 × 24 × 1"
Actual Size
19 ½ × 23 7⁄16 × ¾"
Filter Media
Electrostatically charged 100% synthetic gradient media that does not support microbiological growth
Filter Support Grid
30 gauge galvanized expanded metal grid
Frame
Moisture resistant double-wall beverage board
Max Temperature
180F (82C) continuous service, peak 225F (107C)
Max Humidity
Resistant to 100% R.H.
Initial Resistance
0.18" WC
Rated Velocity
295 FPM

Performance Testing

Particle size efficiency · MERV 8

Share of particles captured, by particle size

0.3–1.0 µm 1.0–3.0 µm 3.0–10 µm
17% 50% 70%

Airflow and resistance

Initial resistance at each airflow rate; lower resistance means less strain on your system

Airflow rate (CFM) 492 738 983 1229 983
Initial resistance (in. w.c.) 0.07 0.11 0.17 0.23 0.17

Max rated airflow

Customer Reviews

4.7 4.7 out of 5 stars
142 verified reviews
5★
(116)
4★
(15)
3★
(5)
2★
(0)
1★
(6)
5
4.7 / 5 (142)
Daniel S. 71 days ago
5
Very prompt delivery
DAVID W. 90 days ago
5
Convenient quantity so they are handy when replacement needed. Surprising amount of airborne dirt trapped!
David C. 160 days ago
5
Expensive. I remember how cheap they were when I started buying from Discount filters. The name doesn't fit as much today!
Harwood B. 187 days ago
5
Excellent products readily available
Elizabeth P. 388 days ago
5
Incredible selection and pricing. Easy ordering.
JoAnn M. 403 days ago
5
Have been purchasing for 10 years very satisfied
Sheila T. 432 days ago
5
i’ve been using these filters for year change 4x a year
Paty 447 days ago
5
i have been with you for 10 years and i m very happy the airs filter work really well and helpme to save money
Nettie M. 455 days ago
5
They are quite effective
Robert S. 535 days ago
5
Work as advertised and the ease of purchase is great.
Robert g. 551 days ago
5
Ordering was very very easy. Staff was professional and friendly. The product came promptly.
philip g. 586 days ago
5
It is a great product for my Furnace. Been using it and doing business with you folks for 12 years+ It works.. I call in my order and Your customer Service is excellent. Very Helpful.
Paul P. 653 days ago
5
I have used these filters, furnace, for a number of years and they work very well. Thanks
Paty 714 days ago
5
MORE THAN 5 YEARS BUYING THIS PRODUCT. IS EXCELENT
Sheila T. 761 days ago
5
does the job. arrived at my door
Robert g. 925 days ago
5
Easy to reorder. It was exactly what I expected. The product is of great quality.
Judy H. 928 days ago
5
Great job but pricey!
Bruce F. 1013 days ago
5
We use Discount filters for all of our filters. Refrigerator, air handler etc. They have the dimensions you need because we all know that a 20 x 20 is really not a 20 x 20.
JoAnn M. 1053 days ago
5
Very good filter fits well
Robert S. 1063 days ago
5
great product
Donald K. 1072 days ago
5
These filters are the first I’ve ordered, but they seem to be fine.
Richard W. 1185 days ago
5
Discount Filters is the all-around best value in cost and quality. These filters out-perform any of the big box brands. Very pleased and would highly recommend.
Hector H. 1319 days ago
5
Good pricing for quality product
Don B. 1414 days ago
5
very good filter for my house. fast shipping.
Dick L. 1758 days ago
4
good quality
Ralph J. 1760 days ago
5
It’s a good, reasonably priced product.
Kelly L. 1871 days ago
5
Excellent service and product.
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